Soot blower seal



R. H. WAGER soo'r BLQWER SEAL June 29, 1948.

Filed Dec. 22, 1944' 2 Sheets-Swat 1 June 29,1948. -R. H. WAGER 2,444,211

SOOTBLOWER SEAL v Filed Dec. 22, 1944 2 Sheets-Sheet 2 Patented June 29, 1948 UNITED STATES PATENT" OFFICE Application December 22, 1944, Serial No. 569,372

4 Claims. (01. 2s522) Difliculty has heretofore been encountered in providing durable packing means for establishing fluid-tight seals around elements extending into enclosures containing hot gases, notably soot blowing elements extendin through boiler furnace walls, and insofar as I am aware, no packing material has been produced which will effectively pack against escape of gases and at the same time resist the temperatures encountered, for any reasonable length of time. My invention, however, overcomes the diiiiculty by providing a novel construction for cooling the packing box and keeping the hot gases away from the same to a large extent, thus greatly diminishing the heat which the packing material must resist and consequently prolonging the life of the packing.

Figure 1 is a front elevation, partly in section, showing the invention applied. I

Fig. 2 is a horizontal sectional View 2-2 of Fig. 1.

Fig. 3 is an enlarged vertical section on line 33 of Fig. 2.

Fig. 4 is a perspective view of one of the hereinafter described rings.

Fig. 5 is a horizontal sectional view partly in top plan, showing a somewhat different form of construction.

Preferred forms of construction have been illustrated in the drawings and will be rather specifically described, with the understanding, however, that within the scope of the invention as claimed, variations may be made.

The structure shown in Figs. 1 to 4, will first be described. In the form of the invention shown in these views, a front plate I!) is provided, designed primarily to be secured by bolts or the like ll against the outer end of a sleeve l2 extending through a boiler front or other Wall [3, the rear side of said plate ll] having a seat for a gasket it. The plate in is formed with a central opening E5 of circular outline, and an outer continuous side wall It surrounds this opening at the inner side of the plate ii], said wall l6 being preferably integrally joined to said plate. An end wall ll is integrally connected with or otherwise secured to the inner end of the side wall I6, said end wall having a central opening l8 of less diameter than the opening l5 of the front plate iii. An inner cylindrical side wall l9 extends through the opening and abuts the end wall 11, said inner wall 19 being welded at 20 to the front plate l ll. The walls l6 and [9 are spaced apart to provide a chamber 2| to receive a cooling fluid, preferably air under pressure, and the front plate H) is formed with one or more inlets 22 for said cooling fiu'id. Two of the inlets 22 are shown, a supply pipe 23 being connected with one of said inlets while the other is simply plugged as shown at 24. 1

Circumferentially spaced ports 25 are formed on line through the inner wall l9 near the end wall 11, said ports extending from the outer to the inner side of said wall and being in communication with the chamber 2|. Within the confines of the wall l9 and in contact with the. end wall I1, is a ring 26, said ringhaving. a peripheral channel 21 in communication with the ports .25. The ring 26 is also formed-with radial ports or channels 28 which extend from the channel 21 to its interior. In the present disclosure, the channel 21 opens not only through the periphery of the ring 26, but through the side of said ring remote from the end wall l1, and the ports 28 are simply grooves in said side of the ring. The channels and ports, however, could be of other forms. The inner diameter of the ring 26 is such as to clear the element 29 to be packed, thus leaving a fluid-conducting passage '30 between said ring and element. Similarly, the opening I 8 of the end wall I! is of such diameter as to clear the member 29, leaving a fluid passage 3| between the two. The member 29, in the present disclosure, is the blower element of a soot blower for cleaning soot from boiler tubes. a p

A ring 32 lies against the side of the ring 26 remote from the end wall l1, and forms an abutment for the rearmost of aplurality of packing rings 33 which surround the element 29 within the confines ofthe inner wall H. A gland 34 extends into the outer end of the wall l9 and is associated with suitable adjustin means 35 mountedon the front plate 10. Adjustment of the gland 34, of course, compresses the packing 33 and holds it tightly around the element '29.

.Air under pressure is forced into the chamber or jacket 2| through the pipe 23 and inlet 22, and from said jacket or chamber the air flows inwardly through the ports 25 of the inner wall I9, into the peripheral channel 21 of the ring 26. From this channel, the air flows inwardly through the ports 28 to the passage 33 and through this passage to the passage 3|, from which it discharges around the element 29, as indicated by the arrows in Fig. 2. The relatively cool air, in circulating around the wall l9 and in flowing inwardly through said wall, keeps the latter relativelycool and thus aids in keeping the packing 23 comparatively cool and protecting it against heat damage. Also, the discharge of air around the element 29 from the passage 3 I, tends to blow the hot gases away from the packing box and prevents them from entering the inner end of the boxand burning the packing. Therefore, conventional packings may be used without danger of injury from the hot gases, insuring long life and overcoming the previous diificulty.

The construction so far described is used principally when sufiicient clearance exists between the blower head 36 and the boiler wall to accommodate the air supply pipe 23 and the gland inner end, the outer end of said inner wall [9 being formed with a lateral flange l9? welded at 28 to the outer wall l6, said flange l9 being inwardly spaced from the outer end of said wall; Iii to allow the packing compressing gland, 34 and its adjusting means 35 to be housed within the confines of the outer portion of said wall I6. The flange [9 is apertured for connection with the air supply pipe 23 All parts within the confines of the inner wall w are substantial duplicates of those within the wall I9 and hence, require no individual description. The assemblage is cooled in the same way by circulation and discharge of air under pressure and the same advantages flow from such cooling.

While preferences have been disclosed, attention is again invited tothe possibility of making variations within the scope of the inventon as claimed.

I claim:

1. A packing box comprising a front plate having an opening, a continuous outer side wall surrounding said opening at the inner side of said front plate and rigidly secured to the latter, an end wall secured to the inner end of. said side wall, said end wall having an opening alined with and of smaller diameter than the opening of said front plate, a. cylindrical inner side wall extending through said opening of said front plate and secured to the latter, the inner end of said inner side wall being in contact with said end wall around the opening of the latter, said outer and inner side walls being spaced apart to provide. a chamber for a cooling fluid, said front plate hailing a fluidinlet for said chamber, said inner side wall having a port from said chamber to its interior near said end wall", a gland in the. outer end of said, inner wall, packing means between said gland and said. end wall, and means for conducting the cooling fluid from the aforesaid port of said inner side wall to said opening of said end wall.

2. A packing box comprising a continuous outer side wall having a lateral attaching flange on its outer end, anv end wall secured to the inner end of said outer side wall and having an open-- ing, an inner cylindrical side wall within the con.-

fines of said outer wall, said inner side wall having a lateral flange on its outer end secured to said outer side wall and spaced inwardly from the outer end of said outer side wall, said outer and inner sidewalls being, spaced apart to provide a chamber for a cooling fluid, said flange of said inner side wall having a fluid inlet for said chamber, said inner side wall being in contact with said end wall around said opening of the latter and having a fluid port communicating with said chamber, a gland in the outer end. of said inner side wall, packing means between said gland and said end wall, and means for conducting the fluid from said port of said inner side wall to said opening of said end wall.

3. A packing box comprising a front plate for attachment to a support, said front platehaviing an opening or circular outline, a continuous outer side wall surrounding and spaced outwardly from the edge of said opening, said outer side wall being disposed at the inner side of said front plate and havingv its outer end integrally joined to, said front plate, an inner end wall integral with the inner end of said side wall, said end wall having an opening alined with and of smaller diameter than the opening of said front plate, a cylindrical inner side wall extending through said opening of said front plate and secured to the latter, the inner end of said inner side. wall being.- disposed against said end wall and spaced around said opening of the latter, saidinner and outer side walls being spaced apart to provide a chamber for a cooling liquid, said front iplate-having a fluid inlet for said chamber, said inner side wall having circumferentially spaced portsfrom said chamber to its interior and located near said end Wall, a ring abutting 'theinner side of said end wall and disposed within said inner side wall, said ring having passages for conducting the cooling fluid from said ports of said inner side wall to said opening of said endwall for discharge around the element to be packed, a gland in the outer end of said inner side wall, and packing means between said ring and said gland.

4. A packing box comprising a continuous outer side Wall having an integral lateral attach-1 ing' flange on its outer end, an inner end wall integral with the inner end of. said outer side wall and having a central opening, an inner cylindrical sidewall within the confines of said outer side wall and having its inner end disposed against said end wall around said opening, the outer end of said inner side wall beingv spaced inwardly from the outer end of said outer side wall and having an integral lateral flange secured to said outerside Wall, the two side walls being spaced apart to provide a chamber for a cooling fluid, said flange of said inner side wall having a fluid inlet for said chamber, said inner sidewall having circumferentially spaced ports from said chamber to its interior and located near said end wall, a ring-abutting the inner side of said end wall and disposed within said inner side Wall, said ring having passages for conducting the cooling fluid from, said ports of said inner side wall to said opening of said end wall for discharge around the element to be packed, a gland in the outer end of said inner side wall, packing means between said ring and said gland, and adjusting means for said gland surrounded by the outer end portion of said outer side wall.

ROBERT HUDSON WAGER.

REFERENCES CITED The following references are of record in the fil'e of this patent:

UNITED STATES PATENTS Number Name Date 1,056,282 Koerting et al- Mar. 18, 1913 1,515,816 .Smitl'i- Nov. 18, 1924 1,806,081 Pratt May 19, 1931 2,223,519 Hornschuch Dec. 3, 1940 2,369,249 Rai-nalter Feb. 13, 1945 FOREIGN PATENTS:

Number Country Date 301,126 Germany 191'? 

